71798 has 4 divisors (see below), whose sum is σ = 107700. Its totient is φ = 35898.

The previous prime is 71789. The next prime is 71807. The reversal of 71798 is 89717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89717 = 73 ⋅1229.

It is an interprime number because it is at equal distance from previous prime (71789) and next prime (71807).

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

71798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17948 + ... + 17951.

It is an arithmetic number, because the mean of its divisors is an integer number (26925).

2⁷¹⁷⁹⁸ is an apocalyptic number.

71798 is a deficient number, since it is larger than the sum of its proper divisors (35902).

71798 is a wasteful number, since it uses less digits than its factorization.

71798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35901.

The product of its digits is 3528, while the sum is 32.

The square root of 71798 is about 267.9514881466. The cubic root of 71798 is about 41.5627347491.

The spelling of 71798 in words is "seventy-one thousand, seven hundred ninety-eight".